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eduard
3 years ago
9

An object moves at a constant rate. The graph shows the object's height at different times. Which equation represents the situat

ion?
A. y = −15x 900
b. y = −15x − 900
c. y = 15x − 900
d. y = 15x 900
Mathematics
2 answers:
pochemuha3 years ago
6 0
The correct answer is 
(A) 
y=-15x+900
zlopas [31]3 years ago
3 0
<span>d. y = 15x 900</span>

Although you do not give the rates I assume the answer is D as it is the only positive multiplication. You cannot have negative height.
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Answer:

Kindly check explanation

Step-by-step explanation:

Given the data:

553 - No

70 - Not Sure

384 - Yes

Total = (553 + 70 + 384) = 1007

Proportion who do think country is headed in the right direction :

P = yes / total = 384/1007 = 0.381

b.) Error margin at 95%

Margin of Error = Zcritical * √p(1-p)/n

1-p = 1 - 0.381 = 0.619

Zcritical at 95% = 1.96

Margin of error = 1.96 * √0.381(0.619)/1007

Margin of error = 0.030

C.)

95% confidence interval for heading in the right direction:

P ± margin of error

P ± 0.030

Lower boundary = 0.381 - 0.030 = 0.351

Upper boundary = 0.381 + 0.030 = 0.411

(0.351 ; 0.411)

D.)

Confidence interval for people who don't think :

P = 553 / 1007 = 0.549

Confidence interval = P ± margin of error

Error margin at 95%

Margin of Error = Zcritical * √p(1-p)/n

1-p = 1 - 0.549 = 0.451

Zcritical at 95% = 1.96

Margin of error = 1.96 * √0.549(0.451)/1007

Margin of error = 0.031

P ± margin of error

P ± 0.031

Lower boundary = 0.549 - 0.031 = 0.518

Upper boundary = 0.549 + 0.031 = 0.580

(0.518 ; 0.580)

E.)

The interval with smaller error margin is ; 0.030 (those who think country is headed in the right direction because sample proportion is farther from .5 / farther from 1)

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A new health drink has ​% of the recommended daily allowance​ (RDA) for a certain vitamin. The RDA for this vitamin is mg. How m
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Step-by-step explanation:

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3 years ago
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Answer:

Solution given:

BD=35ft

AC=43ft

AB=8ft

EF=33-8=25ft

AE=26ft

Now

area of right angled triangle ∆AEF

=½(EF*AE)=½(25×25)=312.5ft²

area of parallel trapezoid=½AB(BD+AC)

=½*8(35+43)=312ft²

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Use the chain rule.

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Did you follow?
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Answer:A=62AED B=93 C=155

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then you divided 310 by 10 which is 31

then you times 2 by 31=62 (a)

3x31=93 (b)

5x31=155 (c)

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2 years ago
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